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United States Patent | 5,011,335 |
Fjeld | April 30, 1991 |
A method and apparatus for positioning in the sea a buoyant platform having a plurality of legs which are movable relative to the platform. One or more tubular elements are detachably suspended from one or more of the legs, such that upon lowering of the legs relative to the buoyant platform, the tubular elements come into contact and rest on the sea bottom. The tubular elements are preferably detached from the legs and a filler material such as gravel is filled into the open ended tubular elements, thereby forming one or more foundations upon which the legs can rest so that the platform can be jacked upwardly relative to the legs and extend above the sea level.
Inventors: | Fjeld; Svein (Oslo, NO) |
Assignee: | Norwegian Contractos A/S (Stabekk, NO) |
Appl. No.: | 299991 |
Filed: | February 14, 1989 |
PCT Filed: | May 13, 1988 |
PCT NO: | PCT/NO88/00042 |
371 Date: | February 14, 1989 |
102(e) Date: | February 14, 1989 |
PCT PUB.NO.: | WO88/08902 |
PCT PUB. Date: | November 17, 1988 |
May 14, 1988[NO] | 872007 |
Current U.S. Class: | 405/204; 405/195.1; 405/196 |
Intern'l Class: | E02B 017/00 |
Field of Search: | 405/196,226,204,205,203,197,198 114/265 175/5-7 |
2210408 | Aug., 1940 | Henry | 405/196. |
2909901 | Oct., 1959 | Suderow. | |
4007598 | Feb., 1977 | Tax | 405/204. |
4063426 | Dec., 1977 | Hansen | 405/226. |
4431345 | Feb., 1984 | Inoue | 405/196. |
4472084 | Sep., 1984 | Boon | 405/196. |
4553878 | Nov., 1985 | Willemse et al. | 405/204. |
Foreign Patent Documents | |||
2065198 | Mar., 1979 | GB. | |
2081782 | Aug., 1980 | GB. | |
2071740 | Dec., 1980 | GB. | |
2079826 | Apr., 1981 | GB. | |
2180870 | Sep., 1985 | GB. |